This record tracks a ransomware attack claimed by the
coinbasecartel group against
Efficy - 43gb leaked. It collects the publicly disclosed attack details — sector, location and
timeline — as published on the operator's leak site and indexed by Breach House.
Window Zero
EXPOSURE GAP
Window Zero is the time the breach stayed in the open before
anyone said so — the gap between when the attack was first discovered
on the operator's leak site (t1) and when it was publicly disclosed (t2).
The wider this window, the longer victims, staff and customers were exposed with no warning.
-56days
t1 · Published
t2 · Disclosed
Disclosed / Notified
Feb 03, 2026
Attack Summary
[AI generated] Efficy is a Belgian company that specializes in developing CRM (Customer Relationship Management) software solutions for businesses to improve customer service and streamline sales processes. They offer tools for managing contacts, sales, customer support, etc. However, the term "43gb leaked" seems to reference a cyber attack or data breach incident, implying there could have been a significant leak of data from the company.
Leak Screenshots
SAMPLE
Proof-of-breach screenshots the operator posted from the stolen data. Previews are
redacted and locked — the originals are available on HaveIBeenRansom.
Dark Web Exposure
Findings for efficy.com
— indexed by HaveIBeenRansom.
124
found in Infostealer logs
266+
found in Traditional breaches
9+
found in Ransomware leaks
Apollo.io DB 816millions.rar
Database World ROC · breach
••• emails
VerificationsIO_BF.7z.011
Kedr | Forum · breach
••• emails
linkedIN_2.7z.001
Database World ROC · breach
••• emails
OnlinerSpambot_BF.7z
B F R e p o V 3 F i l e s · breach
••• emails
pureincubation-com.7z.001
Database World ROC · breach
••• emails
udemy.com.zip
Database World ROC · breach
••• emails
@BreachedData1 LinkedIn 2021-23 Cleaned.7z.001
Database World ROC · breach
••• emails
+ 17 more leak sources locked
Leak volumes are locked
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Legal Disclaimer:
This ransomware victim record reflects information published on the operator's leak site.
Breach.house does not acquire, download, host, access or redistribute unlawfully obtained data. It indexes only publicly visible information posted by ransomware, breach and infostealer operators and open web sources, without accessing the underlying stolen content. The service supports public awareness, legitimate research and cyber-resilience.